NodePort service type in Kubernetes - Mini Project: Build & Apply

Create a Kubernetes NodePort Service

📖 Scenario: You have a simple web application running inside a Kubernetes cluster. You want to expose this application so that it can be accessed from outside the cluster on a specific port.

🎯 Goal: Learn how to create a Kubernetes NodePort service to expose a pod on a fixed port accessible from outside the cluster.

📋 What You'll Learn

Create a pod running the nginx image

Create a NodePort service exposing the pod on port 80 internally

Set the NodePort to 30080

Verify the service is created and accessible

💡 Why This Matters

🌍 Real World

NodePort services are used to expose applications running inside Kubernetes clusters to external clients by opening a port on each node.

💼 Career

Understanding how to expose services with NodePort is essential for DevOps engineers managing Kubernetes clusters and deploying applications accessible outside the cluster.

1

Create a pod running nginx

Create a YAML file named nginx-pod.yaml that defines a pod called nginx-pod running the nginx image with container port 80.

Kubernetes

# Create a pod named nginx-pod running nginx image with containerPort 80
# Your code here

Need a hint?

Use kind: Pod and specify containers with image: nginx and containerPort: 80. Add label app: nginx under metadata.

2

Create a NodePort service configuration

Create a YAML file named nginx-service.yaml that defines a service called nginx-service of type NodePort. It should select the pod with label app: nginx, expose port 80 internally, and use NodePort 30080.

Kubernetes

# Create a NodePort service named nginx-service selecting label app: nginx
# Expose port 80 and set nodePort to 30080
# Your code here

Need a hint?

Use kind: Service with type: NodePort. Set selector: app: nginx and ports with port: 80 and nodePort: 30080.

3

Apply the pod and service to the cluster

Use kubectl apply -f nginx-pod.yaml and kubectl apply -f nginx-service.yaml commands to create the pod and NodePort service in the cluster.

Kubernetes

# Run kubectl apply commands below
# Your code here

Need a hint?

Use kubectl apply -f with the YAML filenames to create resources.

4

Check the NodePort service status

Run kubectl get service nginx-service and print the output to verify the service is created with the correct NodePort 30080.

Kubernetes

# Run kubectl get service nginx-service and print output
# Your code here

Need a hint?

Use kubectl get service nginx-service to see the service details including the NodePort.